About: http://webisa.webdatacommons.org/70203860

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	You can either set an absolute value (e.g. 100 for full volume), or create scripts that increase/decrease, such as the following:
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com